1. Andersen , P. Andersen , S.V. Bodger , L. Friesch , J. Kappel , J.J. 2000 Cavitation Considerations in the Design of Kappel Propellers
2. Beek , G.H.M. Heidemans , J. 1976 Strength Considerations in Controllable Pitch Propeller Design
3. Bjärne , E. 1973 Systematic Studies of Contra-rotating Propellers for Merchant Ships
4. Blount , D.L. Bjärne , E. 1989 Design and Selection of Propulsors for High Speed Craft